I have never had to add coolant to my 2007 Discovery until now. Before we left to winter in Arizona I noticed a coolant leak while it was in my storage shed. It was a corroded radiator hose clamp, now we are are in Flagstaff Freighliner with another coolant leak caused by another corroded and failed radiator hose clamp. My thinking is they must have had some bad hose clamps at about that era. Just informing others with this vintage Freighliner chassis. At least there are a lot of Freighliner service centers around.;)